Screening apparatus



W. S. ACKEN.

SCREENING APPARATUS. APPLICATION FILED JAN. 28. 1920.

Patented June 6, 1922.

arren STATES PATENT OFFICE.

Y wILnx s. AenEN, or mnsnrcrrir, NEW JERSEY, ASSIGNOZR, TO noisiNs CONVEYING a a -BnmcomrANY, aconronA'rroN or NEW messy.

- SCREENING APPARATUS.

To all whom it concern:

' Be it known that I, WILEY S. AoKnN, a

citizen of the United States, and resident of v Jersey City, in the county of Hudson and State of New Jersey, have invented certainnew and useful Improvements in Screening Apparatus, of which the following is a specific'ation. v iv This invention relates to screening or separating apparatusfor coal, rock, and other similar materials, .having' reference especially tosuch apparatus wherein rows of spaced-apart? feeding and screening disks ticularly described and claimed.

are 'employed. j 1

The object of my invention istoprovide a simple, durable and efficient construction whereby all-liability of the clogging of material between the opposing. peripheral and hub portions of the succeeding disks is obviated; which clogging more rfrequently occurs when the material under treatment in a damp or plastic condition.

To this end my inventi'on consists in the novel formation and arrangement of the teeth of the disks'as will be hereinafter par- In the drawings-- I 4 Figure 1 is aside elevation ofa screening apparatus embodying my invention, a part structure.

of one wall being broken away for clear-.

:Fig. 2 is a partial plan of the structure. Fig. 3 a transverse-section, enlar ed,

through two adjacent shafts, showing t eir co-operating feeding and screening disks.

Referring to he drawings, 10 designates a supporting] frame having inclined sides- 11v provided with boxes 12 in which are 'our-,

nalled transverse shafts 13. 'These s afts are mounted in spaced parallel relation to each other, their-ends at one'side off the frame being outwardly extended and provided with sprocket-wheels 14 which are suc cessively connected by chains 15 so as to be simultaneously and continuously driven in the same direction when one of the shafts is Y actuated from a suitable source of power.

differential in character so as to increase their-speed progressively from the upperniost to the lowermost shaft, that is'from the receiving to the delivery end of the Each of thg shafts is provided with-a plurality of spaced-apart feeding and screeni vSpecification ofLetters Patent. Patented June 6, 1922, 1 Application filed army as, 1920, Serial No. 354,672. Y

ing disks 16 having hubs 17 which are keyed or otherwise secured v to the shaft so as to rotate with-it, The relative arrangement'of the disks is such that those on two adjacent shafts are in staggered relation to each other,

thus-providing narrow spaces between adjacent co-operating disks and enabling the said disks to feed particles of the mass of material from one to the other progressively .down the incline of the screen.

of two adjacent disks so as'to enable particles generally topass between the peripheries of the disks on one shaft and the hubs of the co-operating disks on the adjacent shafts.

When thematerial under treatment is in a damp or plastic condition it frequently becomes clogged in the spaces between the teeth and hubs 'of the respective opposing disks, and thus interferes with the eflicient operation of the apparatus.

To overcome this objection I make one or more (preferablyone) of the teeth-of each disk longer than the others as indicated at 18, so as to rotate in close relation to the hub of the cooperating disk on the adjacent shaft, and I so dispose the disks on each shaft that the long teeth thereof are out of alinement with or in staggered relation to each other, there-. by preventing the long teeth, f adjacen disks from passing in proximity to the opposing hubs at the same time. The teeth 18' of the respective disks of-feach shaft thus individually and at. different intervals. of time, impinge: against and break up any material that may cling within or' tend to clogthe spaces between the peripheries and hubs respectively of the succeeding rows of disks. 7

Preferably the hub ofeach, disk is pro vid'ed with a series of spaced key-ways 19 (in the present instance four), any oneof which may be applied to the key 20 on the shaft in order toefiect the desired location of the long tooth in relation to the corresponding tooth of the adjacent disk on the shaft; Y

I claim-.- A screening apparatus forthe purpose described comprising a supporting frame a that may tend to clog between the periphery plurality of spacedapart parallel shafts, of the disk and an opposing shaft, and the means for actuating said shafts, and a series disks of each series being so disposed that of peripherally toothed disks on each of said the long teeth thereof are out of alinement 5 shafts, each series of disks extending into with each other. 15 the spaces between the disks of'the adjacent Signed at Birmingham, in the county of shafts and relatively near to said shafts,ea "1 Jeffersonand State of Alabama this 16th disk having at least one long tooth posidayof Jan, A. D1920. tioned to turn in close relation to the adja- 10 cent shafts and thus break up any material WILEY S. ACKEN. 

